Node structure provided with non-structural bearing cast-in-place self-insulation bare concrete outer wall

Abstract

The invention relates to a node structure provided with a non-structural load-bearing cast-in-place self-insulation bare concrete outer wall, which can be at least used for connecting a building outer wall and an indoor load-bearing structure, the node structure comprises the indoor load-bearing structure comprising one or more of a structural floor, a first structural column and a first structural boundary beam; the non-structural load-bearing cast-in-place self-heat-preservation bare concrete outer wall is supported on the indoor load-bearing structure; the non-structural load-bearing cast-in-place self-insulation bare concrete outer wall comprises a bare concrete wall body with the heat conductivity coefficient being smaller than 0.5 W / m.k; the steel bar frame is located in the bare concrete wall body so as to provide a supporting framework for the bare concrete wall body.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, in particular to a node structure provided with a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall. Background Art

[0002] Under the guidance of the national dual carbon (carbon peak and carbon neutrality) goals, the low-carbonization of concrete and cement has also become a focus of industry research. Cast-in-place plain concrete, as an important building material, is an important research direction in the field of green buildings.

[0003] In recent years, cast-in-place plain concrete materials have been increasingly used in domestic and foreign engineering practices. The purity and aesthetics of the material have won the favor of various civil construction projects and municipal engineering projects. However, in practice, this material also has obvious disadvantages in terms of energy saving: when plain concrete is used for building exterior walls, the thermal insulation performance is poor. The thermal conductivity of the material itself is about 1.7W / mk, which does not meet the basic requirements for energy saving in most civil engineering projects.

[0004] In order to meet the thermal insulation requirements of the exterior walls of exposed concrete buildings, the current conventional practice is to use two methods: internal wall insulation or "sandwich" sandwich construction. Internal insulation is to set the insulation layer on the indoor side of the wall. Although it can solve the thermal insulation problem of the exterior wall, it will occupy the area of ​​the indoor space. What is more disadvantageous is that the indoor side of the wall will not be able to achieve the appearance of exposed concrete, which seriously affects the design effect. The "sandwich" structure is an inner and outer two-layer cast-in-place exposed concrete slab plus an extruded polystyrene insulation layer in the middle, which can ensure that both the indoor and outdoor sides of the exterior wall have an exposed effect. However, this construction method is more complex, with many construction processes, complex template production and steel bar binding construction processes, high measures and labor costs and costs, and difficult to locate the insulation layer during construction. Summary of the invention

[0005] In view of the above analysis, an embodiment of the present invention aims to provide a node structure provided with a non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall, so as to at least solve one of the above problems.

[0006] On the one hand, the present invention provides a node structure provided with a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, which can at least be used to connect the exterior wall of a building with an indoor load-bearing structure, and the node structure includes:

[0007] Indoor load-bearing structure, including one or more of structural floor slab, first structural column, and first structural side beam;

[0008] Non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall, the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall is supported on the indoor load-bearing structure;

[0009] Among them, the non-structural load-bearing cast-in-place self-insulating fair-faced concrete exterior wall includes:

[0010] A fair-faced concrete wall with a thermal conductivity < 0.5W / m.k;

[0011] A steel bar framework located inside the fair-faced concrete wall to provide a support framework for the fair-faced concrete wall.

[0012] Furthermore, the structural floor slabs or the first structural side beams of adjacent floors respectively extend to the upper and lower ends of the non-structural load-bearing cast-in-place self-insulating fair-faced concrete exterior wall;

[0013] Preferably, the upper and lower ends of the non-structural load-bearing cast-in-place self-insulating fair-faced concrete exterior wall are connected to the first structural side beam or the structural floor slab extending to the exterior wall through the first connecting steel bars;

[0014] The first connecting steel bars are in the shape of "U", with the open ends located inside the non-structural load-bearing cast-in-place self-insulating fair-faced concrete exterior wall and the closed ends located in the first structural cantilever slab of the first structural side beam;

[0015] The first connecting steel bars are vertically arranged. One side of the first connecting steel bars extends and binds along the vertical longitudinal bars of the steel bar framework close to the first structural side beam, and the other side of the first connecting steel bars binds to the stirrups of the steel bar framework;

[0016] Preferably, the non-structural load-bearing cast-in-place self-insulating fair-faced concrete exterior wall is connected to the first structural column through the second connecting steel bars;

[0017] The second connecting steel bars are in the shape of "Ji", with the open ends located inside the non-structural load-bearing cast-in-place self-insulating fair-faced concrete exterior wall and the closed ends located in the first structural column;

[0018] The second connecting steel bars are horizontally arranged, and both sides of the second connecting steel bars extend vertically outwards, and the vertically extending sections extend and bind along the horizontal transverse bars of the steel bar framework far from the first structural column.

[0019] Furthermore, the lap lengths of the lap joints of the longitudinal tension steel bars of the first connecting steel bars, the second connecting steel bars and the steel bar framework are not less than 350mm, and the lap lengths of the lap joints of the longitudinal compression steel bars are not less than 250mm.

[0020] Furthermore, a first gap is provided between the upper and lower ends of the non-structural load-bearing cast-in-place self-insulating fair-faced concrete exterior wall and the first structural cantilever slab, and a first flexible connection layer is provided in the first gap;

[0021] The outside of the first structural cantilever slab is covered with a first insulation layer;

[0022] A second gap is provided between the inner side wall of the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall and the first structural side beam and the first structural column, and a second flexible connection layer is provided in the second gap;

[0023] The non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall is provided with a second insulation layer on the structural floor within a range of 500±50mm towards the indoor direction.

[0024] On the other hand, the present invention provides a node structure provided with a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, which can be used at least for connecting the top exterior wall of a building with the top load-bearing structure, and the node structure comprises:

[0025] Non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall;

[0026] A top-floor load-bearing structure, wherein at least a portion of the top-floor load-bearing structure is inserted and fixed in the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall; the top-floor load-bearing structure comprises one or more of a roof structural plate, a second structural column, and a second structural side beam;

[0027] Wherein, the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall comprises:

[0028] For exposed concrete walls, thermal conductivity is less than 0.5W / mk;

[0029] A steel bar frame is located inside the fair faced concrete wall to provide a supporting framework for the fair faced concrete wall.

[0030] Further, the top structural plate or the second structural side beam extends into the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall, and the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall is connected to the second structural side beam or the top structural plate extending into the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall through a third connecting steel bar;

[0031] Preferably, the second structural side beam is provided with a second structural cantilever plate extending into the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall;

[0032] The second structural cantilever is located in the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall, one end of the third connecting steel bar is located in the second structural cantilever, and the other end extends downward into the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall.

[0033] Furthermore, the third connecting steel bar is in a "U" shape, with an open end located in the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall, and a closed end located in the second structural cantilever plate;

[0034] The third connecting steel bar is arranged vertically;

[0035] One side of the third connecting steel bar is extended and bounded along the vertical longitudinal bars of the steel bar frame close to the second structural edge beam, and the other side of the third connecting steel bar is bounded to the tension bars of the steel bar frame.

[0036] Furthermore, a third insulation layer is provided on the outer side and bottom of the second structural cantilever plate, and the longitudinal section of the third insulation layer is "L"-shaped, extending from the outer side to the bottom of the second structural cantilever plate;

[0037] A third gap is provided between the inner side wall of the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall and the second structural side beam and the second structural column, and a third flexible connection layer is provided in the third gap;

[0038] A fourth thermal insulation layer is provided on the top of the top structural plate, and a waterproof layer is provided on the fourth thermal insulation layer.

[0039] In another aspect, the present invention provides a node structure provided with a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, which can at least be used to connect the exterior wall of the bottom floor of a building with the load-bearing structure of the bottom floor, and the node structure comprises:

[0040] The underlying load-bearing structure, including the structural foundation and the ground;

[0041] Non-structural load-bearing cast-in-place self-insulating plain concrete exterior walls are set on the structural foundation;

[0042] Wherein, the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall comprises:

[0043] For exposed concrete walls, thermal conductivity is less than 0.5W / mk;

[0044] A steel bar frame is located inside the fair faced concrete wall to provide a supporting framework for the fair faced concrete wall.

[0045] Furthermore, the structural foundation is located below the ground, and the portion of the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall is inserted into the ground and is located directly above the structural foundation;

[0046] The structural foundation includes a base and a support column, wherein the support column is located on the base;

[0047] The cross section of any part of the base is larger than the cross section of the support column, and the cross section of the support column is larger than the cross section of the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall;

[0048] Preferably, the portion of the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall located below the ground and the side walls of the support columns are paved with waterproofing membranes;

[0049] Preferably, the support column is provided with a limiting portion embedded in the non-structural load-bearing cast-in-place self-insulating plain concrete outer wall, and the limiting portion is located on both sides of the non-structural load-bearing cast-in-place self-insulating plain concrete outer wall;

[0050] Preferably, a fifth insulation layer is provided on the ground within a range of 1000±100mm in the direction of the indoor room of the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, and a moisture-proof layer is also provided between the fifth insulation layer and the ground;

[0051] The side walls of the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall below the ground facing outdoors and the outer side walls of the support columns are provided with a sixth insulation layer.

[0052] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0054] Figure 1 It is a structural schematic diagram of a non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall in a specific implementation method;

[0055] Figure 2 A vertical cross-sectional view of a node structure of Example 2 in a specific implementation manner;

[0056] Figure 3 It is a horizontal cross-sectional view of the node structure of Example 2 in the specific implementation manner;

[0057] Figure 4 It is a vertical cross-sectional view of the node structure of Example 3 in the specific implementation manner;

[0058] Figure 5 It is a vertical cross-sectional view of the node structure of Example 4 in the specific implementation manner.

[0059] Reference numerals:

[0060] 1-exterior wall; 11-bright concrete wall; 111-protective coating; 12-steel frame; 121-horizontal transverse reinforcement; 122-vertical longitudinal reinforcement; 123-tension reinforcement; 2-indoor load-bearing structure; 21-structural floor; 211-second insulation layer; 22-first structural column; 23-first structural side beam; 231-first structural cantilever; 231a-first insulation layer; 24-first connecting steel bar; 25-second connecting steel bar; 26-first flexible connection layer; 27-second flexible connection layer; 3-top load-bearing structure; 3 1-roof structure board; 311-fourth insulation layer; 312-waterproof layer; 32-second structure column; 33-second structure side beam; 331-second structure cantilever plate; 331a-third insulation layer; 34-third connecting steel bar; 35-third flexible connection layer; 4-bottom load-bearing structure; 41-structural foundation; 411-base; 412-support column; 413-limiting part; 42-ground; 421-fifth insulation layer; 422-moisture-proof layer; 43-waterproof membrane; 44-sixth insulation layer; 45-seventh insulation layer. DETAILED DESCRIPTION

[0061] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0062] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral connection, which can be a mechanical connection, or an electrical connection, which can be a direct connection, or can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The terms "top", "bottom", "above", "lower", and "on" used throughout the description are relative to the relative positions of components of a device, such as the relative positions of the top and bottom substrates within a device. It is understood that devices are multifunctional regardless of their orientation in space.

[0064] The common working surface of the present invention can be a plane or a curved surface, can be inclined, or can be horizontal. For the convenience of description, the embodiment of the present invention is placed on a horizontal plane and used on the horizontal plane, and "high and low" and "up and down" are defined in this way.

[0065] Embodiment 1

[0066] This embodiment discloses a non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall (hereinafter referred to as the exterior wall), such as Figure 1 As shown, the outer wall 1 comprises:

[0067] Fair-faced concrete wall 11, thermal conductivity <0.5W / mk;

[0068] The steel bar frame 12 is located inside the fair-faced concrete wall 11 to provide a supporting framework for the fair-faced concrete wall 11 .

[0069] The material of the plain concrete wall 11 is high thermal resistance lightweight aggregate concrete, and the selection standard is that the thermal conductivity of the material needs to be less than 0.5W / mk, and the 28d standard curing compressive strength of the high thermal resistance non-structural load-bearing cast-in-place plain concrete is greater than 10Mpa.

[0070] The high thermal resistance lightweight aggregate concrete includes the following components in parts by weight: 501 to 860.3 parts of fast-setting and fast-hardening high-belite sulphoaluminate cement, 281 to 431.5 parts of lightweight aggregate, 0.05 to 0.17 parts of cellulose, 20.0 to 155.8 parts of silica fume, 205 to 265 parts of water, 2.70 to 5.04 parts of water reducer, 0.92 to 1.98 parts of defoamer, 2.67 to 7.94 parts of high molecular polymer glue powder, 1.65 to 5.18 parts of retarder, 0 to 289.1 parts of fly ash, 0 to 0.15 parts of accelerator, 0 to 86.4 parts of pigment and 0 to 1.32 parts of glass fiber; wherein the lightweight aggregate includes at least one of hollow glass microspheres, fly ash ceramsite and shale ceramsite.

[0071] The fast-setting and fast-hardening high belite sulphoaluminate cement comprises at least one of white crack-resistant fast-setting and fast-hardening high belite sulphoaluminate cement, crack-resistant fast-setting and fast-hardening high belite sulphoaluminate cement, white ultra-high-strength fast-setting and fast-hardening high belite sulphoaluminate cement and high-strength fast-setting and fast-hardening high belite sulphoaluminate cement.

[0072] The silica fume includes ordinary silica fume and / or white silica fume.

[0073] The water reducer includes at least one of a polycarboxylate water reducer, a melamine water reducer and a melamine water reducer.

[0074] The water reducer includes at least one of a polycarboxylate water reducer, a melamine water reducer and a melamine water reducer.

[0075] The high molecular polymer rubber powder includes at least one of redispersible vinyl acetate / ethylene copolymer rubber powder, carboxylic acid-based block copolymer rubber powder and acrylic polymer rubber powder.

[0076] The retarder includes at least one of sodium citrate, citric acid, sodium gluconate and zinc carbonate.

[0077] The quick-setting agent includes lithium carbonate and / or lithium sulfate.

[0078] The pigment includes at least one of iron oxide pigment, titanium dioxide and chromium oxide green.

[0079] The fly ash is fly ash of level 2 or above.

[0080] The glass fibers include alkali-resistant glass fibers.

[0081] The cellulose includes at least one of methyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose and carboxymethyl cellulose.

[0082] The high thermal resistance lightweight aggregate concrete also includes silicate cement, and the proportion of the silicate cement replacing the fast-setting and fast-hardening high-belite sulphoaluminate cement is ≤80%.

[0083] The present invention adopts fast-setting and fast-hardening high-belite sulphoaluminate cement as the main cementitious material, which improves the early strength of high thermal resistance light aggregate concrete and thus improves production efficiency. Light aggregate is the core material, and the raw materials cooperate with each other to produce decorative concrete with higher fluidity, no floating, low thermal conductivity, high strength, no cracking, and no need for water curing. The surface layer of the high thermal resistance light aggregate concrete does not crack, has basically no bubbles, no large color difference, a smooth and flat surface, and good water retention performance, thereby eliminating water curing, simplifying the process, and avoiding efflorescence caused by water curing to affect the beauty of the concrete surface layer. The high thermal resistance light aggregate concrete has high tensile bonding strength and can be used for a firm bonding with other concrete base surfaces.

[0084] For example, the high thermal resistance lightweight aggregate concrete is composed of the following raw materials: 501 kg of 42.5 grade white anti-cracking double-fast cement, 20.0 kg of 920 silica fume, hollow glass microspheres (particle size 0.15-0.3 mm, bulk density (460 ± 40 kg / m 3 )) is 208.0kg, hollow glass microspheres (particle size 1.0-2.0mm, bulk density (280±30Kg / m 3 )) is 179.0kg, PC8300 water reducer is 4.6kg, P8850 defoamer is 0.92kg, carboxymethyl cellulose is 0.17kg, 5010 rubber powder is 4.52kg, sodium citrate is 3.4kg and water is 221kg, and the water-to-material ratio is 0.24.

[0085] High thermal resistance lightweight aggregate concrete is composed of the following raw materials: 42.5 grade white anti-cracking double-fast cement is 601kg, 920 silica fume is 61.4kg, hollow glass microspheres (particle size 0.15-0.3mm, bulk density is (460±40Kg / m 3 )) is 270.3kg, hollow glass microspheres (particle size 1.0-2.0mm, bulk density (280±30Kg / m 3)) is 76kg, C900 polycarboxylic acid water reducer is 4kg, P8850 defoamer is 1.33kg, lithium carbonate is 0.1kg, carboxymethyl cellulose is 0.10kg, 5010 rubber powder is 6.14kg, sodium gluconate is 3.59kg and water is 205kg, and the water-to-material ratio is 0.2.

[0086] High thermal resistance lightweight aggregate concrete is composed of the following raw materials: 72.5 grade white ultra-high strength double-fast cement 749kg, white silica fume 55.1kg, chrome green 2.2kg, hollow glass microspheres (particle size 0.15-0.3mm, bulk density (460±40Kg / m 3 )) is 231.4kg, hollow glass microspheres (particle size 1.0-2.0mm, bulk density (280±30Kg / m 3 )) is 49.6kg, C900 polycarboxylic acid water reducer is 4.07kg, P803 defoamer is 0.55kg, P8850 defoamer is 1.1kg, lithium carbonate is 0.11kg, carboxymethyl cellulose is 0.11kg, 5044 rubber powder is 6.6kg, Yum zinc carbonate is 1.65kg and water is 220kg, and the water-to-material ratio is 0.2.

[0087] Specifically, the composition of high thermal resistance lightweight aggregate concrete can be found in CN115073106B, wherein any example that meets the requirement of thermal conductivity less than 0.5W / mk and 28d standard curing compressive strength greater than 10Mpa can be used in the present invention and will not be described in detail.

[0088] Preferably, the steel frame 12 comprises:

[0089] Two relatively parallel steel meshes, the steel meshes comprising a plurality of interwoven horizontal transverse bars 121 and vertical longitudinal bars 122;

[0090] A plurality of tie bars 123 are located between the two steel meshes, i.e., the two ends of the tie bars are connected to the two steel meshes respectively. Preferably, one end of the tie bar is wound around the horizontal transverse bar of one steel mesh, and the other end of the tie bar is wound around the horizontal transverse bar of the other steel mesh, and the tie bar 123 is straightened between the two steel meshes, i.e., the tie bar 123 is perpendicular to the two steel meshes.

[0091] The method for preparing the exterior wall 1 comprises the following steps:

[0092] S101: Arrange the steel frame 12 according to the design;

[0093] S102: A model that is set to match the exposed concrete wall according to the design;

[0094] S103: Casting with high thermal resistance lightweight aggregate concrete, and dismantling the model after curing to obtain the exterior wall 1.

[0095] The exposed concrete wall 11 is provided with a protective coating 111, that is, the exposed concrete wall 11 is coated with a protective agent on the outside, and the protective agent is made of materials with good environmental protection, weather resistance, anti-fouling and water repellency, so as to further improve the use effect of the exterior wall. Exemplarily, the protective agent is a fluorocarbon resin exposed concrete protective agent or a silicone resin exposed concrete protective agent, and the fluorocarbon resin exposed concrete protective agent: the polymer containing a fluorocarbon bond (FC) in the main chain or side chain of the molecule is a fluorocarbon resin, and the fluorocarbon resin coating has the highest known bond energy of 485kJ / mol in the carbon-fluorine bond in its molecule, and the FC bond is very stable. Fluorocarbon resin can transmit more than 95% of the medium and long waves in the ultraviolet region (220nm-400nm) of sunlight, and only ultraviolet light with a wavelength of no more than 220nm can destroy the FC bond, but the proportion of these short-wave ultraviolet rays in sunlight is very small, and it is easily absorbed by the atmospheric ozone layer. Therefore, the exposed water protective agent coating containing fluorocarbon resin has super weather resistance. The higher the fluorine content, the better the weather resistance of the material. Currently, all products on the market, whether domestic or imported, except for fluorocarbon protective agents, are silicone resin plain concrete protective agents with a warranty period of 10 years.

[0096] Embodiment 2

[0097] This embodiment discloses a node structure with a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, which can at least be used for connecting a building exterior wall (the building exterior wall adopts the exterior wall provided in the first embodiment, i.e., a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall) with an indoor load-bearing structure, such as Figure 2-3 As shown, including:

[0098] Indoor load-bearing structure 2, including one or more of structural floor slab 21, first structural column 22, and first structural side beam 23;

[0099] The first embodiment discloses a non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall 1, wherein the exterior wall 1 is supported on the indoor load-bearing structure 2.

[0100] Exemplarily, the indoor load-bearing structure 2 of the middle layer of a high-rise building (i.e., a building with more than three floors) includes a structural floor 21, a first structural column 22, and a first structural side beam 23, wherein the first structural side beam 23 is supported on the first structural column 22, and the structural floor 21 is supported on the first structural side beam 23, and the first structural column 22 provides longitudinal support for the entire high-rise building, and also plays a role in supporting each building layer, i.e., the first structural column 22 extends from the foundation of the high-rise building to the top. The first structural side beam 23 provides horizontal support for the first structural floor 21 of each layer.

[0101] The exterior wall 1 is configured to be located between at least two first structural floors 21 , and is connected to the structural floors 21 , the first structural columns 22 and the first structural edge beams 23 .

[0102] The structural floor slabs 21 or the first structural side beams 23 of the adjacent layers extend to the upper and lower ends of the exterior wall 1, respectively, that is, the structural floor slabs 21 or the first structural side beams 23 of the upper layer extend to just above the upper end of the exterior wall 1, and the structural floor slabs 21 or the first structural side beams 23 of the lower layer extend to just below the lower end of the exterior wall 1. Preferably, the structural floor slabs 21 or the first structural side beams 23 of the adjacent layers extend beyond the vertical center line of the exterior wall 1 to improve the supporting stability of the exterior wall. Specifically, the first structural side beams 23 are provided with first structural cantilevers 231 extending to both ends of the exterior wall 1, that is, the first structural side beams of the upper layer are provided with first structural cantilevers extending above the upper end of the exterior wall, and the first structural side beams of the lower layer are provided with first structural cantilevers extending below the lower end of the exterior wall. The vertical center line of the exterior wall passes through the first structural cantilevers 231, that is, the first structural cantilevers 231 extend beyond the center of the inner and outer sides of the exterior wall. Alternatively, the structural floor 21 extends to both ends of the exterior wall 1, that is, the upper structural floor extends above the upper end of the exterior wall, and the lower structural floor extends below the lower end of the exterior wall, and both the upper and lower structural floors extend beyond the vertical center line of the exterior wall, that is, both the upper and lower structural floors extend beyond the center of the inner and outer sides of the exterior wall.

[0103] In this embodiment, the first structural side beam 23 is provided with a first structural cantilever plate 231 extending outward, and the first structural side beam, the first structural cantilever plate 231 and the structural floor slab 21 are cast together, that is, the three are integrally formed.

[0104] The upper and lower ends of the outer wall 1 are connected to the first structural edge beam or structural floor slab extending to the outer wall through the first connecting steel bar 24.

[0105] In this embodiment, Figure 2 As shown, the upper and lower ends of the exterior wall 1 are respectively connected to the first structural cantilever plates 231 of the upper and lower first structural side beams 23 through the first connecting steel bar 24, that is, one end of the first connecting steel bar 24 is connected to the first structural cantilever plate 231, and the other end is connected to the exterior wall 1. Specifically, one end of the first connecting steel bar 24 extends into the exterior wall 1 and is bound to the steel bar frame 12 of the exterior wall, and the other end of the first connecting steel bar 24 extends into the first structural cantilever plate 231 and is bound to the steel bars in the first structural cantilever plate 231. Preferably, the shape of the first connecting steel bar 24 is similar to a "U" shape, with the open end located in the exterior wall 1 and the closed end located in the first structural cantilever plate 231. The first connecting steel bar 24 is vertically arranged, one side of the first connecting steel bar is extended and bound along the steel bar frame 12 close to the vertical longitudinal reinforcement 122 of the first structural side beam 23, and the other side of the first connecting steel bar is bound to the tension reinforcement 123.

[0106] The outer wall 1 is connected to the first structural column 22 through the second connecting steel bar 25. Figure 3 As shown, one end of the second connecting steel bar 25 is connected to the exterior wall 1, and the other end is connected to the first structural column 22. Specifically, one end of the second connecting steel bar 25 extends into the exterior wall 1 and is bound to the steel bar framework 12 of the exterior wall, and the other end of the second connecting steel bar 25 extends into the first structural column 22 and is bound to the steel bars inside the first structural column 22. Preferably, the shape of the second connecting steel bar 25 is similar to a "Ji" shape, with the open end located in the exterior wall 1 and the closed end located in the first structural column 22. The second connecting steel bar 25 is horizontally arranged, and both sides of the second connecting steel bar 25 extend vertically outwards, and the vertically extending sections extend and are bound along the horizontal cross bar 121 of the steel bar framework 12 away from the first structural column.

[0107] Preferably, the lapping length of the lapping joints of the longitudinal tension steel bars of the first connecting steel bar, the second connecting steel bar, and the steel bar framework is not less than 350 mm, and the lapping length of the lapping joints of the longitudinal compression steel bars is not less than 250 mm to ensure the structural safety and reliability during use.

[0108] There is a first gap between the upper and lower ends of the exterior wall 1 and the first structural cantilever slab 231, and a first flexible connection layer 26 is provided in the first gap. Preferably, the first gap is 30 ± 5 mm, and the material of the first flexible connection layer 26 is a flexible material. Exemplarily, the first flexible connection layer is an extruded polystyrene board.

[0109] To avoid the formation of cold and heat bridges, the outer side of the first structural cantilever slab 231 is covered with a first insulation layer 231a, and at the same time, it can prevent the phenomenon of local condensation, mildew, and dripping on the inner side of the exterior wall due to excessive temperature difference between indoors and outdoors. The first insulation layer is an extruded polystyrene board with a thickness of not less than 30 mm.

[0110] There is a second gap between the inner side wall (the side wall facing the interior) of the exterior wall 1 and the first structural side beam 23 and the first structural column 22, and a second flexible connection layer 27 is provided in the second gap to improve the connection strength between the wall and the first structural side beam 23 and the first structural column 22. Preferably, the second gap is 30 ± 5 mm, and the material of the second flexible connection layer is a flexible material. Exemplarily, the second flexible connection layer is an extruded polystyrene board.

[0111] For heat preservation, a second insulation layer 211 is provided on the structural floor slab within a range of 500 ± 50 mm in the direction towards the interior of the exterior wall, that is, a second insulation layer 211 within a range of 500 ± 50 mm is provided on the side of the structural floor slab 21 close to the exterior wall. Preferably, a moisture-proof layer is also provided between the second insulation layer 211 and the structural floor slab 21. The thickness of the second insulation layer is 30 - 50 mm.

[0112] It should be noted that Figure 2 and Figure 3For the sake of clarity, only the steel frame of the exterior wall and the steel bars connecting it to the interior load-bearing structure are shown, and the steel bars of the interior load-bearing structure itself are not drawn.

[0113] The construction method of the node structure in this embodiment includes the following steps:

[0114] S201: constructing an indoor load-bearing structure, and simultaneously setting a first connecting steel bar and a second connecting steel bar to be connected to the exterior wall;

[0115] S202: tying the steel bar frame of the exterior wall, and tying the steel bar frame with the first connecting steel bar and the second connecting steel bar;

[0116] S203: Setting a template matching the steel frame according to the design, and setting a first insulation layer and a first flexible connection layer at the same time;

[0117] S204: Use high thermal resistance lightweight aggregate concrete for pouring, remove the model after curing, extrude to form a second flexible connection layer, lay a second insulation layer on the structural floor, and obtain the node structure with an external wall in this embodiment.

[0118] In order to ensure the integrity and beauty of the building's exterior, the outer vertical longitudinal reinforcement 122 of the lower steel frame in step S202 is extended to the upper layer, and the formwork in step S203 can wrap the first structural cantilever, that is, when pouring high thermal resistance lightweight aggregate concrete, the outer side of the first structural cantilever is also wrapped at the same time to form a building wall without obvious faults, thereby improving the stability of the building.

[0119] Embodiment 3

[0120] This embodiment discloses another node structure provided with a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, which can be used at least for connecting the top floor exterior wall of a building (the top floor exterior wall of the building adopts the exterior wall provided in the first embodiment, i.e., the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall) with the top floor load-bearing structure, such as Figure 4 As shown, including:

[0121] The non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall 1 disclosed in the first embodiment;

[0122] The top-floor load-bearing structure 3 is at least partially inserted and fixed in the outer wall 1, that is, the outer wall is fixed on the top-floor load-bearing structure 3; the top-floor load-bearing structure 3 includes one or more of a roof structure plate 31, a second structure column 32, and a second structure side beam 33.

[0123] Exemplarily, the top-floor load-bearing structure 3 of a high-rise building includes a roof structure plate 31 , a second structure column 32 , and a second structure side beam 33 , wherein the second structure side beam 33 is supported on the second structure column 32 , and the roof structure plate 31 is supported on the second structure side beam 33 .

[0124] It should be noted that the first structural column 22 and the second structural column 32 belong to different parts of the same structural column. The first structural column is located in the middle layer, and the second structural column is located in the top layer, respectively providing longitudinal support for the layers they are located in. The first structural side beam has the same structure as the second structural side beam. The first structural side beam is located in the middle layer to provide horizontal support for the structural floor slab, and the second structural side beam is located in the top layer to provide horizontal support for the top layer structural slab.

[0125] It should be noted that the connection relationship between the second structural column and the outer wall is the same as the connection relationship between the first structural column and the outer wall in the second embodiment, that is, the outer wall is connected to the second structural column through the second connecting steel bar, one end of the second connecting steel bar is connected to the outer wall, and the other end is connected to the second structural column. Specifically, one end of the second connecting steel bar extends into the outer wall and is bound to the steel bar frame of the outer wall, and the other end of the second connecting steel bar extends into the second structural column and is bound to the steel bar in the second structural column. Preferably, the shape of the second connecting steel bar is similar to a "few" shape, the open end is located in the outer wall, and the closed end is located in the second structural column. The second connecting steel bar is arranged horizontally, and the two sides of the second connecting steel bar extend vertically outward, and the vertical extension section extends and binds along the horizontal transverse bars of the steel bar frame away from the second structural column. A second gap is provided between the inner side wall of the outer wall and the second structural column, and a second flexible connecting layer is provided in the second gap to improve the connection strength between the wall and the second structural column. Preferably, the second gap is 30±5mm, and the material of the second flexible connecting layer is a flexible material. For example, the second flexible connecting layer is an extruded polystyrene board.

[0126] The top structural plate 31 or the second structural side beam 33 extends into the exterior wall, that is, the top structural plate 31 or the second structural side beam 33 extends outward and is inserted into the exterior wall to be connected with the exterior wall. Preferably, the top structural plate 31 or the second structural side beam 33 extends beyond the vertical center line of the exterior wall 1 to improve the supporting stability of the exterior wall. Specifically, the second structural side beam 33 is provided with a second structural cantilever plate 331 extending into the exterior wall 1, and the vertical center line of the exterior wall passes through the second structural cantilever plate 331, that is, the second structural cantilever plate 331 extends beyond the center of the interior and exterior sides of the exterior wall. Alternatively, the top structural plate 31 extends into the exterior wall 1, and the top structural plate extends beyond the vertical center line of the exterior wall, that is, the top structural plate extends beyond the center of the interior and exterior sides of the exterior wall.

[0127] In this embodiment, the second structural side beam 33 is provided with a second structural cantilever plate 331 extending outward, and the second structural side beam, the second structural cantilever plate 231 and the top structural plate 31 are cast together, that is, the three are integrally formed.

[0128] The second structural cantilever plate 331 is inserted into the outer wall, and the outer wall above the second structural cantilever plate 331 constitutes a parapet wall supported above the top structural plate.

[0129] The outer wall is connected to the second structural edge beam or the top structural plate extending into the outer wall through the third connecting steel bar 34 .

[0130] In this embodiment, Figure 4 As shown, the second structural overhang plate 331 of the second structural side beam 33 is located in the exterior wall 1, one end of the third connecting steel bar 34 is located in the second structural overhang plate 331, and the other end extends downward into the exterior wall. Preferably, the third connecting steel bar 34 is shaped like a "U", with the open end located in the exterior wall 1 and the closed end located in the second structural overhang plate 331. The third connecting steel bar 34 is vertically arranged, one side of the third connecting steel bar is extended and bound along the steel bar frame 12 close to the vertical longitudinal reinforcement 122 of the second structural side beam 33, and the other side of the third connecting steel bar is bound to the tension reinforcement 123.

[0131] In order to improve the connection strength between the outer wall and the second structural side beam 33, the vertical longitudinal bars 122 of the steel frame 12 of the outer wall close to the second structural side beam 33 vertically penetrate the second structural side beam.

[0132] Preferably, the lap length of the longitudinal tensile steel bar binding lap joint of the third connecting steel bar and the steel bar frame is not less than 350 mm, and the lap length of the longitudinal compressive steel bar lap joint is not less than 250 mm, so as to ensure the safety and reliability of the structure in use.

[0133] To avoid the generation of hot and cold bridges, a third insulation layer 331a is provided on the outer side and bottom of the second structural cantilever plate 331. The longitudinal section of the third insulation layer 331a is "L"-shaped, extending from the outer side to the bottom of the second structural cantilever plate 331, which can prevent the inner side of the exterior wall from condensing, mildew, and dripping due to the large temperature difference between indoor and outdoor. The third insulation layer is an extruded polystyrene board with a thickness of not less than 30 mm.

[0134] A third gap is provided between the inner side wall (the side wall facing the interior) of the exterior wall 1 and the second structural side beam 33 and the second structural column 32, and a third flexible connection layer 35 is provided in the third gap to improve the connection strength between the wall and the second structural side beam 33 and the second structural column 32. Preferably, the third gap is 30±5 mm, and the material of the third flexible connection layer is a flexible material, and illustratively, the third flexible connection layer is an extruded polystyrene board.

[0135] In order to keep warm and prevent moisture, a fourth insulation layer 311 is laid on the top of the top structural board 31, and a waterproof layer 312 is laid on the fourth insulation layer 311. Preferably, the thickness of the fourth insulation layer is 50 to 150 μm, and the fourth insulation layer is an extruded polystyrene board. The material of the waterproof layer is 4+3SBS thermoplastic polyester waterproof membrane, and the waterproof layer is generally laid in two layers, one layer is 4 mm and the other layer is 3 mm.

[0136] In practical applications, the material thickness, structural form and roof heat transfer coefficient of the waterproof layer of the fourth insulation layer should meet the energy-saving and insulation requirements of the building location.

[0137] It should be noted that Figure 4 For the sake of clarity, only the steel bars of the exterior wall and the connecting steel bars between the exterior wall and the top-floor load-bearing structure are shown; the steel bars of the interior load-bearing structure itself are not drawn.

[0138] The construction method of the node structure in this embodiment includes the following steps:

[0139] S301: Build the top load-bearing structure, set the third connecting steel bar to be connected to the outer wall, and set the vertical longitudinal reinforcement of the outer wall close to the side beam of the second structure;

[0140] S302: tying the steel bar frame of the exterior wall, and tying the steel bar frame and the third connecting steel bar together;

[0141] S303: Setting a template matching the steel frame according to the design, and setting a third insulation layer at the same time;

[0142] S304: Use high thermal resistance lightweight aggregate concrete for pouring, remove the model after curing, extrude to form a third flexible connection layer, lay a fourth insulation layer and a waterproof layer on the top structural plate, and obtain the node structure with an exterior wall in this embodiment.

[0143] In order to ensure the integrity and beauty of the building's exterior, the outer vertical longitudinal reinforcement 122 of the lower steel frame in step S202 is extended to the upper layer, and the formwork in step S203 can wrap the first structural cantilever, that is, when pouring high thermal resistance lightweight aggregate concrete, the outer side of the first structural cantilever is also wrapped at the same time to form a building wall without obvious faults, thereby improving the stability of the building.

[0144] Embodiment 4

[0145] This embodiment discloses a third node structure with a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, which can be used at least for connecting the exterior wall of the bottom floor of a building (the exterior wall of the bottom floor of the building adopts the exterior wall provided in the first embodiment, i.e., the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall) with the bottom load-bearing structure, such as Figure 5 As shown, including:

[0146] The bottom load-bearing structure 4 includes a structural foundation 41 and a ground surface 42;

[0147] The non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall 1 disclosed in the first embodiment is arranged on the structural foundation 41 .

[0148] Specifically, the structural foundation 41 is located below the ground 42 , and a portion of the exterior wall 1 is inserted into the ground and is located directly above the structural foundation 41 .

[0149] The structural foundation 41 includes a base 411 and a support column 412, and the support column is located on the base; the cross section of any part of the base 411 is larger than the cross section of the support column 412, and the cross section of the support column 412 is larger than the cross section of the outer wall 1. The shape of the support column 412 matches the outer wall. Such a configuration is provided to provide stable support for the outer wall.

[0150] The part of the outer wall below the ground and the side wall of the support column 412 are paved with waterproofing membrane 43, which plays an effective waterproof and hydrophobic role, and prevents groundwater from rising above the ground along the inner part of the outer wall due to capillary action, which has an adverse effect on the comfort of the indoor thermal environment. Exemplarily, the waterproofing membrane is a 3mm thick SBS polyester waterproofing membrane, a 1.5mm polyethylene polypropylene waterproofing material, or a 1.5mm ethylene propylene rubber waterproofing membrane (EPDM).

[0151] In order to improve the supporting strength of the support column to the external wall, the support column 412 is provided with a limiting portion 413 embedded in the external wall. The limiting portion 413 is located on both sides of the external wall, and the longitudinal section of the limiting portion 413 is a right triangle. One right-angled side of the right triangle is close to the external wall, and the other is close to the top of the support column 412 to more stably support the external wall.

[0152] For heat preservation, a fifth insulation layer 421 is provided on the ground within a range of 1000±100mm of the outer wall toward the indoor direction, that is, a fifth insulation layer 421 within a range of 1000±100mm is provided on the side of the indoor ground close to the outer wall. Preferably, a moisture-proof layer 422 is further provided between the fifth insulation layer 511 and the ground. Exemplarily, the fifth insulation layer is a 50mm thick extruded polystyrene board insulation layer, and the moisture-proof layer is a 1.5mm thick polyurethane waterproof coating.

[0153] In order to avoid cold and hot bridges, the side walls of the exterior wall below the ground facing the outside and the outer side walls of the support columns (the side walls facing the outside) are provided with a sixth insulation layer 44. Preferably, the sixth insulation layer is an extruded polystyrene board with a thickness of 30±5mm. A seventh insulation layer 45 is provided on the ground within a range of 1000±100mm of the exterior wall facing the outside. By providing the seventh insulation layer horizontally and the sixth insulation layer vertically outdoors, the insulation and heat insulation performance of the weak positions of the exterior wall can be improved to avoid cold and hot bridges.

[0154] The structural foundation and the ground are the bottom structure of the bottom layer, which also includes the top structure of the bottom layer, that is, the bottom load-bearing structure also includes the third structural column, the third structural side beam and the bottom structural floor slab. The third structural column, the third structural side beam and the bottom structural floor slab constitute the top structure of the bottom layer. The relationship between the three and the exterior wall is the same as the connection relationship between the first structural column, the first structural side beam and the structural floor slab and the exterior wall in Example 2. Only the connection relationship between the bottom of the bottom exterior wall is different, that is, the connection relationship between the top of the bottom exterior wall and the third structural side beam and the bottom structural floor slab is the same as the connection relationship between the top of the exterior wall and the second structural side beam and the structural floor slab in Example 2, and the connection relationship between the bottom exterior wall and the third structural column is the same as the connection relationship between the exterior wall and the second structural column in Example 2, which will not be repeated here.

[0155] The third structural column extends from the structural foundation to the ground indoors. The third structural column, the first structural column and the second structural column belong to different parts of the same structural column. The first structural column is located in the middle layer, the second structural column is located in the top layer, and the third structural column is located in the bottom layer, respectively providing longitudinal support for the layers they are located at.

[0156] It should be noted that Figure 5 For the sake of clarity, the steel bars of the exterior walls and the bottom-level load-bearing structure are not drawn.

[0157] The construction method of the node structure in this embodiment includes the following steps:

[0158] S401: Build and cast the structural foundation, which is cast with ordinary concrete;

[0159] S402: Tie up the steel frame of the exterior wall, set up the formwork that matches the steel frame according to the design, use high thermal resistance lightweight aggregate concrete for pouring, and remove the formwork after curing;

[0160] S403: Waterproof membrane and the sixth insulation layer are sequentially arranged outside the exterior wall and the structural foundation, and soil is filled to form the indoor and outdoor floors. Then, the second moisture-proof layer, the fifth insulation layer, and the seventh insulation layer are laid respectively to obtain the node structure with an exterior wall in this embodiment.

[0161] The non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall of the present invention is an integrated structure, does not adopt a composite structural system such as a "sandwich" sandwich insulation, and has excellent high thermal resistance and self-insulation performance. The exterior wall of the present invention adopts high thermal resistance lightweight aggregate concrete, which has higher thermal resistance, lower thermal conductivity, and better energy-saving effect than ordinary concrete, so the exterior wall extruded polystyrene board insulation layer can be eliminated.

[0162] The present invention can solve the problems of complex structural and construction technical measures, high labor costs, widespread cold and hot bridges affecting the thermal insulation performance of the exterior wall, and heavy wall weight in the design and construction of "sandwich" non-structural load-bearing cast-in-situ self-insulating plain concrete exterior walls.

[0163] The present invention proposes corresponding improvement measures for the shortcomings in the design and construction of bare concrete buildings. The high thermal resistance non-structural load-bearing cast-in-place self-insulating bare concrete exterior wall uses lightweight aggregate concrete raw materials, combines the shape and function, structural system, thermal insulation enclosure system, thermal structure, waterproof structure and other system characteristics of the bare concrete exterior wall, and uses a simple and homogeneous exterior wall structure layer to replace the current "sandwich" composite structure, making the building structure system lighter and safer, while reducing the difficulty of construction technology, and achieving the lightweight of concrete materials and the reduction of construction and building measures.

[0164] The present invention only uses high thermal resistance non-structural load-bearing cast-in-place plain concrete on the exterior walls of buildings with thermal insulation requirements, while the interior structural floors, roof panels, interior walls, interior beams and columns are still constructed with ordinary concrete. The structural system is simple and reasonable, the design and construction principles are the same as those of ordinary concrete buildings, and the cost is low and the economy is good. The matching wall body node structure is closely matched with the overall exterior wall system, the technology is simple, the construction is convenient, and the problems existing in the existing technology can be effectively solved and the comprehensive efficiency of the building can be improved.

[0165] Since the exterior walls of fair-faced concrete buildings are generally complex in structure, have poor energy-saving effects, and have high construction technology and cost, the application scenarios are currently mainly high-end buildings or places such as museums and exhibition halls, and the scope of application is greatly limited. On the other hand, as the construction industry enters a period of stable development, urban renewal and rural transformation and upgrading will become the future development direction of the construction industry, and the number of small-scale new micro-renewal projects will increase. The present invention is a green and low-carbon building construction technology, which maximizes the energy-saving and consumption-reduction potential of fair-faced concrete enclosure structures, reduces the carbon emission level of concrete buildings, and reduces construction costs and construction difficulties. Therefore, it can expand the scope of application of fair-faced concrete, enhance industrial added value, and broaden the application scenarios of materials and technologies, which is in line with industry development trends and emerging business needs.

[0166] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A node structure with a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, characterized in that: It can at least be used to connect the building exterior wall and the indoor load-bearing structure, and the node structure includes: Indoor load-bearing structure, including one or more of structural floor slab, first structural column, and first structural side beam; Non-structural load-bearing cast-in-place self-insulating plain concrete exterior walls are supported on the interior load-bearing structure; Wherein, the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall comprises: For exposed concrete walls, thermal conductivity is less than 0.5W / mk; A steel bar frame is located inside the fair faced concrete wall to provide a supporting framework for the fair faced concrete wall.

2. The node structure according to claim 1, characterized in that: The structural floor slabs or the first structural edge beams of the adjacent layers extend to the upper and lower ends of the non-structural load-bearing cast-in-place self-insulating plain concrete exterior walls respectively; Preferably, the upper and lower ends of the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall are connected to a first structural edge beam or structural floor slab extending to the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall through a first connecting steel bar; The first connecting steel bar is in a "U" shape, with an open end located in the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall, and a closed end located in the first structural cantilever plate of the first structural side beam; The first connecting steel bar is arranged vertically, one side of the first connecting steel bar is extended and bounded along the vertical longitudinal bars of the steel bar frame close to the first structural side beam, and the other side of the first connecting steel bar is bounded to the tension bars of the steel bar frame; Preferably, the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall is connected to the first structural column via a second connecting steel bar; The second connecting steel bar is in the shape of a "J" with an open end located in the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall and a closed end located in the first structural column; The second connecting steel bar is arranged horizontally, and both sides of the second connecting steel bar extend vertically outward, and the vertical extension section is extended and bound along the steel bar frame away from the horizontal transverse reinforcement of the first structural column.

3. The node structure according to claim 2, characterized in that: The lap length of the longitudinal tensile steel bar binding lap joints of the first connecting steel bar, the second connecting steel bar and the steel bar frame shall not be less than 350 mm, and the lap length of the longitudinal compressive steel bar lap joints shall not be less than 250 mm.

4. The node structure according to claim 3, characterized in that: A first gap is provided between the upper and lower ends of the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall and the first structural cantilever plate, and a first flexible connecting layer is provided in the first gap; A first thermal insulation layer is provided on the outer side of the first structural cantilever plate; A second gap is provided between the inner side wall of the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall and the first structural side beam and the first structural column, and a second flexible connection layer is provided in the second gap; The non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall is provided with a second insulation layer on the structural floor within a range of 500±50mm towards the indoor direction.

5. A node structure with a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, characterized in that: At least it can be used to connect the top floor exterior wall of a building with the top floor load-bearing structure, and the node structure includes: Non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall; A top-floor load-bearing structure, wherein at least a portion of the top-floor load-bearing structure is inserted and fixed in the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall; the top-floor load-bearing structure comprises one or more of a roof structural plate, a second structural column, and a second structural side beam; Wherein, the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall comprises: For exposed concrete walls, thermal conductivity is less than 0.5W / mk; A steel bar frame is located inside the fair faced concrete wall to provide a supporting framework for the fair faced concrete wall.

6. The node structure according to claim 5, characterized in that: The top structural plate or the second structural side beam extends into the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall, and the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall is connected to the second structural side beam or the top structural plate extending into the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall through a third connecting steel bar; Preferably, the second structural side beam is provided with a second structural cantilever plate extending into the non-structural load-bearing cast-in-place self-insulating plain concrete non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall; The second structural cantilever is located in the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall, one end of the third connecting steel bar is located in the second structural cantilever, and the other end extends downward into the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall.

7. The node structure according to claim 6, characterized in that: The third connecting steel bar is in a "U" shape, with an open end located in the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall and a closed end located in the second structural cantilever plate; The third connecting steel bar is arranged vertically; One side of the third connecting steel bar is extended and bounded along the vertical longitudinal bars of the steel bar frame close to the second structural edge beam, and the other side of the third connecting steel bar is bounded to the tension bars of the steel bar frame.

8. The node structure according to claim 6, characterized in that: A third insulation layer is provided on the outer side and bottom of the second structural cantilever plate, and the longitudinal section of the third insulation layer is "L"-shaped, extending from the outer side to the bottom of the second structural cantilever plate; A third gap is provided between the inner side wall of the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall and the second structural side beam and the second structural column, and a third flexible connection layer is provided in the third gap; A fourth thermal insulation layer is provided on the top of the top structural plate, and a waterproof layer is provided on the fourth thermal insulation layer.

9. A node structure with a non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, characterized in that: It can at least be used to connect the bottom outer wall of a building with the bottom load-bearing structure, and the node structure includes: The underlying load-bearing structure, including the structural foundation and the ground; Non-structural load-bearing cast-in-place self-insulating plain concrete exterior walls are set on the structural foundation; Wherein, the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall comprises: For exposed concrete walls, thermal conductivity is less than 0.5W / mk; A steel bar frame is located inside the fair faced concrete wall to provide a supporting framework for the fair faced concrete wall.

10. The node structure according to claim 9, characterized in that: The structural foundation is located below the ground, and the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall is inserted into the ground and is located directly above the structural foundation; The structural foundation includes a base and a support column, wherein the support column is located on the base; The cross section of any part of the base is larger than the cross section of the support column, and the cross section of the support column is larger than the cross section of the non-structural load-bearing cast-in-place self-insulating plain concrete exterior wall; Preferably, the portion of the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall located below the ground and the side walls of the support columns are paved with waterproofing membranes; Preferably, the support column is provided with a limiting portion embedded in the non-structural load-bearing cast-in-place self-insulating plain concrete outer wall, and the limiting portion is located on both sides of the non-structural load-bearing cast-in-place self-insulating plain concrete outer wall; Preferably, a fifth insulation layer is provided on the ground within a range of 1000±100mm in the direction of the indoor room of the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall, and a moisture-proof layer is also provided between the fifth insulation layer and the ground; The side walls of the non-structural load-bearing cast-in-situ self-insulating plain concrete exterior wall below the ground facing outdoors and the outer side walls of the support columns are provided with a sixth insulation layer.

Images